Hey guys, need your feedback. I will be installing a Stillen CAI and Full true dual Catback Exhaust system on my 2003 G35 Coupe 6MT, do you think I will be able to achieve 300HP at the crank with the following mods:

Z-tube, Stillen CAI and Exhaust?

A guy from Cali had his G35 Coupe 6MT Dynoed and he sent me a pic of his 3 runs, he has the Stillen Exhaust and an Injen CAI only, the car has 5,200 miles. He had 3 runs and they were all pretty close, his best run (3rd one) had 243.4 Max Torque and 251.7 Max HP at the wheels of course. What's the average % loss 18% or 20%?, at the crank that would mean he's pretty damn close to the 300HP mark, will my configuration above get me there?

Thanks in advance!

 

The only way you'll know for sure is to pull the engine and use a LAB water brake engine dyno. DynoJet chassis dynos are way optimistic.

The usual correction factor for a 6MT is 15-16%.......the 5AT is more like 20-22% depending on the dyno and tires.